.TH  DLAG2S 1 "November 2006" " LAPACK PROTOTYPE auxilary routine (version 3.1) " " LAPACK PROTOTYPE auxilary routine (version 3.1) "
.SH NAME
DLAG2S - a DOUBLE PRECISION matrix, SA, to a SINGLE PRECISION matrix, A
.SH SYNOPSIS
.TP 42
SUBROUTINE DLAG2S(M,N,A,LDA,SA,LDSA,INFO)
.TP 42
.ti +4
INTEGER
INFO,LDA,LDSA,M,N
.TP 42
.ti +4
REAL
SA(LDSA,*)
.TP 42
.ti +4
DOUBLE
PRECISION A(LDA,*)
.SH PURPOSE
DLAG2S converts a DOUBLE PRECISION matrix, SA, to a SINGLE
PRECISION matrix, A.

RMAX is the overflow for the SINGLE PRECISION arithmetic
.br
DLAG2S checks that all the entries of A are between -RMAX and
RMAX. If not the convertion is aborted and a flag is raised.

This is a helper routine so there is no argument checking.

.SH ARGUMENTS
.TP 8
M       (input) INTEGER
The number of lines of the matrix A.  M >= 0.
.TP 8
N       (input) INTEGER
The number of columns of the matrix A.  N >= 0.
.TP 8
A       (input) DOUBLE PRECISION array, dimension (LDA,N)
On entry, the M-by-N coefficient matrix A.
.TP 8
LDA     (input) INTEGER
The leading dimension of the array A.  LDA >= max(1,M).
.TP 8
SA      (output) REAL array, dimension (LDSA,N)
On exit, if INFO=0, the M-by-N coefficient matrix SA.
.TP 8
LDSA    (input) INTEGER
The leading dimension of the array SA.  LDSA >= max(1,M).
.TP 8
INFO    (output) INTEGER
= 0:  successful exit
.br
> 0:  if INFO = k, the (i,j) entry of the matrix A has
overflowed when moving from DOUBLE PRECISION to SINGLE
k is given by k = (i-1)*LDA+j

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